Joist-form.



T. J. BARKER & F. L. MILLER.

JOIST FORM( APPLICATION mfp ffrsrwll.

Patented. Jan. 15, 1918.

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lW'yandotte and State of vented a certain new and useful lmproveventiOn,

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THOMAS J'. ZEKER AND FRANK L. MILLER', 0F ROSEDALE, SAS.

Application mea rebruaryis, 1917. [serial no. 14eme.

To all whom z't may concern:

Be it known that we, THOMAS J. BARKER and FRANK L, MILLER, citizens of the United States, residing at Rosedale, in the county of Kansas, have inment in Joist-Forms, of which the following is a specification.

Uur invention relates to improvements in joist forms.

It relates particularly to joist forms for making concrete joists.

One of the objects of our invention is to provide ajoist form, which may be adjustable as to width and height, which, when not in use, may be collapsed, and the parts nestedV so as to bein compact form for storage or transportation, which may be easily assembled and disassembled, which is cheap to manufacture, which is strong and durable and not ,liable to get out of repair, and which may be readily removed from its operative position after the material which forms the joist has become sufliciently set.

The novel features of our invention are hereinafter fully described and claimed. lln the accompanying drawing which illustratesthe preferred embodiment of our in- Figure l is a perspective view of our improved joist form, with the end closure removed.4

Fig. 2 is an inside elevation of the end closure. p

Fig. 3 isgan under View of our improved joist form. i

- Fig. 4 is an outside elevation of the end closure.

Fig. 5 is a perspective view, reduced, of one of the right-angled members and parts connected therewit Fig. 6 is a vertical sectional view on the line 6 6 of Fig. 3.

Fig. 7 is a plan view, partly broken away, of a number of our joist forms shown supported on soiit boards.

Fig. 8 is an enlarged cross section on the line 8-8 of Fig. 7.

Similar reference characters designate similar parts in the different views.

1 and 2 designate respectively two substantially right-angled members having horizontal tops which overlap and are ad- Lustable toward and from each other, thereforming an inverted U-shaped form which is extensible as to Width. e The sides of the members 1 and 2 are upright and, preferably, have a slight taper to Patented Jaim. 115, 31918.

enable thelr ready removal from the concrete. Said sides are extensible as to height, and for this purpose, there is disposed for this purpose'at the inner side of each upright portion or side of each member l and 2, an upright plate 3 which is provided at its lower edge with an inwardly extending longitudinal flange 4. Rigidly secured, by soldering, riveting or otherwise, to each plate 3, are two upwardly extending bars 5, whichk are provided each with a vertical row of'holes 6, which are adapted to register with a hole 7, of which two are provided in each upright portion or side of the members l and 2. A bolt 8 extends through the hole 7 and through one of the holes 6. On the bolt 8 at the inner side of the plate 5 is mounted a nut 9 which bears against the inner side of the plate 5, Fig. 6.

By changing the bolts 8 to different holes 6, the height of the form may be varied.

For holding the members 1 and 2 in the positions to which they are adjusted, the following described mechanism may be employed.

A pair of brace members, preferably comprising channeled members, 10 and 11, are pivoted on vertical axes to the under side of the top of the member 1 and to two brackets 12 respectively, which are secured to the inner side of the upright portion of said member..

The brace members 10-and 11 are arranged so as to be swung from a longitudinal position to a horizontal transverse position as shown in Figs. l and 3.

The member l1 is of suiicient width to embrace the member l0 when the two are swung tothe longitudinal position shown in manner, the brace member 11 of theimember 1 is adapted to embrace and telescopically engage the member 10 which is pivoted to the member 2.

To the under side of the top of the member 2 are secured downwardly extending stops 13 and 14 for engaging the members 11 to limit their outward-swinging movement. a

For holding said brace members in the transverse position, we provide a longitudinal central brace member 15, the 'ends of which are adapted to enter the two brace members 10 at right. angles thereto and between the lianges thereof.

Two securing devices Comprising, preferably, two nails 16, are insertible through holes 17, of which a longitudinal row is provided in the lower flange of each memberv 10 and 11.

Said holes 17 are so arranged that when the members 1 and 2 are adjusted to the proper position, the nails 16 may be inserted through holes 17 which are in register with each other and the nails driven -into the` wooden brace member 15, as shown in Fig. 6.

For closing the en'd of the form, a closure is provided which is extensible as to width and height. Referring particularly to Figs. 2 and 4, 18 designates a plate disposed vertically and provided atits upper and outer side edges with inwardly extending flanges y. 22 which extends through a hole in the plate 20 and through a horizontal slot 23 in the plate 18. On the inner side of the bolt 22 and bearing against the inner side of the plate 18 is a nut 24. Vertically adjustable in the plates 18 and 20, are two vertical plates 25 and 26, each of which is provided with a vertical row of holes 27, each of which is adapted to register with a hole provided in each of the plates A18 and 20. Two bolts 28 are respectively mounted in said holes in the plates 18 and 20, and extend each through one of the holes 27. Respectively mounted on the bolts 28 are nuts 29, which respectively bear against the inner sides of the plates 25 and 26.

The plate 26 is provided with a `hole through which extends a horizontal bolt 30,

which also extends through a horizontal slot 31 in the plate 18. On the bolt 30 is mounted a nut 32 which bears against the inner side of the plate 18.

By properly adjusting the bolts 22, 28 and 30, the closure my be adjusted to snugly fit over the outside and one end of the inverted U-shaped form, as shown in Figs. 3 and 6. The lower edge of the plate 25 is provided with an inwardly extending flange/33. The outer side edges of the plates 25 and 26 are provided with inwardly turned flanges 34 adapted to respectively embrace opposite sides of the inverted U-shaped form.

One end of said U-shaped form is slightly smaller than the other end, so that such smaller end may be itted within the larger end of an adjacent form, as shown in Fig. 7 when a number of these forms are fitted together end to end.

In the operation of' our invention, a series of horizontal longitudinal and transverse soilit boards 35 are erected. Secured' to the edges of said soiiit boards 35 and extending above the upper surfaces thereof are detachable blocks 36, Figs. 7 and` 8.' Upon the sofit boards 35 are placed inverted U-shaped forms with the flanges 4 resting upon theA boards 35 with theirinner edges disposed l against the blocks 36 which form stops for holding the forms from lateralmovement. Nails 37 are inserted through holes provided in the flanges 4 and driven into the adjacent 'sotlit boards 35, for holding the form mem- 'bers 1 and 2 from longitudinal movement,

see Fig. 8.

The end closures are then applied to the opposite ends respectively of the series of forms which have been fitted together, as shown in Fig. 7, with the. anges 33 of said closures having their 'inner edges bearing against the adjacent stock blocks 36, with which the inner edges of the transverse soffit boards 35 are provided. v

The concrete is then vpoured upon the soiit boards 35 and the assembled U-shaped4 forms, covering the latter to the required depth and permitted to standuntil suiiciently hardened, after which the blocks 36 are removed from the sofit boards 35, and the nails 16 and 37 withdrawn. The brace members 10 and 11, upon the removal of the 110 brace members 15, may then be swung `to the longitudinal position shown in Fig. 5, after which the members 1 and 2 may be removed an upright side, and a brace member pivoted i to the inner side of said right-angled member and adapted to be swung from alongitudinal collapsed position to a horizontal transverse position relatively to said rightangledmember and provided with a longimatassa tudinal row of holesadapted to receive a securing device.

2. In a joist form, a substantially right- 3. In a joist form, a substantially rightangled member having a horizontal top and provided with an upright substantially vertically extensible side, the lower edge of which is provided with an inwardly turned longitudinal flange, and a brace member pivoted to the inner side ofsaid right-angled vmember and adapted to beswung from a longitudinal collapsed position to a horizontal transverse position. relatively to said right-angled member.v

4. In a joistform, a substantially right angled member having a horizontal top and provided with an uprlght substantially vertically extensible side, the lower edge of which is provided withan inwardly turned longitudinal flange, anda brace member pivoted to the inner side of said right-angledmember and adapted to be swung from a longitudinal collapsed position to a horizontal transverse lposition relatively to said right-angled member and having a longitudinal row of holes adapted to receive a securing device.

5. In a joist form, a4 substantially rightangled member having a horizontal top and l an upright side, and two brace members pivoted to the inner side thereof so as to be swung from a longitudinal position to a horizontal transverse position, each brace member having a longitudinal row of holes adapted to receive a securing device.

6. In a joist form, a substantially rightangled member having a horizontal top and an upright side, and two channel brace members pivoted to the inner side thereof so as to be swung from a horizontal transverse position to a longitudinal position, one of the brace members having a 'channel suiciently wide to receive the other brace members when the brace members are in the longitudinal position.

7. In a lioist form, a. substantially rightangled member having a horizontal top and an upright side, and two channel brace members pivoted to the inner side thereof so as to be swung from a horizontal transverse .position to a longitudinal position, `one of the brace members having a width such that it will embracev the other -brace member; when the brace members are in `the longi- `an upright side,

ward and from each other,

tudinal position, each brace member having a longitudinal row of holes adapted to receive a securing device.

,'8. In a joist form, a substantially rightangled member having a horizontal top and the latter having at its lower edge an inwardly turned longitudinal flange,

and two channel brace members pivoted toy the inner side of said right-angled member,

one channel member havingl a width which permits it to embrace the other channel member when they are in the longitudinal position.

9. In a joist form,A a substantially rightangled member having a horizontal top and an upright side, the latter having `at its lower edge an inwardly turned longitudinal flange, said side being substantially vertically extensible, and two channel brace members pivoted to the inner side of said rightangled member, one channel member having a width which permits it to embrace the otherchannel member when they are in the longitudinal position, each of said channel members having a longitudinal row of holes adapted to receive a securing. device.

10. Ina joist form, al substantially right- "angled member having a horizontal top and an upright side, said member having on its inner side a stop, and a brace member pivoted tothe inner side of said right-angled member and adapted to be swung from a horizontal transverse position against said stop to a longitudinal position.

11. In a Joist form, two substantially right-angled members having overlapping horizontal tops and upright sides, two brace members respectively pivoted to the inner sides of said right-angled members so 4as to swing from a longitudinal position to horizontal transverse positions, the right angled members being adjustable toward and from each other, and means for releasably securing together said brace members.

- l2. In a joist form, two substantially right-angled members having overlapping horizontal tops and upright sides and adjustable toward and from each other, two channel brace members respectively pivoted to said right-angled members so as to be swung from a longitudinal position to a horizontal transverse position and in the latter position being adapted to telescopingly engage each other, and releasable means for securing the brace members to each other in said last named position.

13. In a joist form, two substantially right angled members having overlapping tops and upright sides and adjustable totwo pairs of brace members pivoted one pair to the inner side of each right-angled member so as to be. swung from a longitudinal position to a horizontal transverse position and in the latter position being adapted for engagement means for releasably securing the longitudi-v nal brace member to the two pairs of brace Ails with the adjacent brace member of the other i pair, a longitudinal brace member, and

members so as to hold the latter in the trans'- verse position. y Y

, 14. In va joist form, two substantially right-angled members adjustable toward and from each other, two pairs of braceme'mbers respectively pivoted to the inner sides of `said right-angled, members so as to be.

swung `from a longitudinal position to a yhorizontal `transverse position, each brace 15. In a joist form, horizontal supports, stops secured thereto and extending above the upper surfaces thereof, two substantially right-angled 'members having overlapping horizontal tops and upright sides and'adj ustable toward and from each other, each side having at its lower edge'and inwardly extending longitudinal flange, said sides resting respectively on said supports, and the inner edges of said flanges respectively en gaging said stops and releasable means for securing said right-angled members in theV positions to which theyi tively to each other.

16. In a joist form, horizontal supports, stops secured thereto and extending above the upper surfaces thereof, two substantially right-angled members having overlapping may be adjusted rela horizontal-tops and upright sides and adjustable toward and from each other, each side having at 'its lower edge an inwardly extending longitudinaliiange having its inner edge bearing against one of said stops, two

brace members respectively pivoted to the inner sides of said right-angled members S0 as to be swung from a longitudinal to a horizontal transverse position, and means forreleasably securing saidbrace members to each other in said transverse position.

17. In a joist. form, two right-angled members havingoverlapping tops and upright sides and adjustable toward and from each other, releasable bracing means connecting said right-angled members, said sides .of 4said members being substantially verticall extensible, and a closure extensible as to height 'and width and having flanged edges respectively embracing the outer sides of said right-angled members. y

18. In a joist form, horizontal supports stops secured thereto, and extending above the uppe'r surfaces thereof, two substantially right-angled members having overlapping horizontal tops and upright sides and adjustable toward and from each other, each side having at its lower edge an inwardly extending longitudinal flange having its inner edge bearing against one of said stops, releasable bracing' means connecting -said right-angled members', and an end closure extensible as to width and embracing the l outer sides of said right-angled members and having at .its lower edge an inwardly v extending ange which bears against one of said stops.

In testimony whereof we havesigned our names to this specification.

' THOMAS J. BARKER.

FRANK L. MILLER. 

